Speed control mechanism



June 25, 1935. G. GRIMSLEY` f 2,006,136

SPEED CONTROL MECHANISM FiledMarch v15, 1934' 2 sheets-sheet 1 S r\ Q INH Inventor Attomey June 25, 1935. G. GRlMsLl-:Y '4 2,005,136

SPEED CONTROLMEQHANISM Filed March 15,--1954 2 sheets-sheet. 2

Inventor Atto'mey Pate-med .lese 25, 1935 UNITED STATES PATENT OFFICE 2,006,136 y SPEEDl CGNTROL MECHANISM Gail Grlmsley, Little Sioux, Iowa Application March 15, 1934, Serial No. 715,768

lclaim.

This invention appertains to new and useful improvements in speed controlling mechanisms of the centrifugal type.

The principal object of the present invention is to provide a speed control mechanism which in operation will be accurate and not susceptible to the development of ready defects'.

Another important object of the present in' vention is to provide a mechanism of the character stated which is of simple construction, to the end that the same can be manufactured at low cost.

Other important objects and advantages of the invention will become apparent to the reader of the following specification.

In the drawingm- Figure 1 represents a fragmentary longitudinal Referring to the drawings wherein like nu`V merals designate like parts, it can be seen in Figure 1 that numeral 6 generally refers to the speed control mechanism, while numeral 3 generally refers to an electricmotor having the power shaft l extending therefrom, both the motor and speed control mechanism being mounted on a suitable base 8.

The speed control consists of a housing 8 provided with a closure plate Il at one end having a centrally located packing gland II through which the aforementioned motor shaft 1 extends.

.Numeralj I2 represents the drive shaft which extends through a packing gland I3 at the opposits end of the housing 9 and merges into the vinternally toothed gear or ring I4 within which the rotor I5 operates, the rotor having the advjacent endof the shaft 1 engaged into the same and properly secured thereto. The rotor is provided with a tubular extension IB which is -reduced and engaged into a socket at the inner end of the drive shaft I2, this reduced end :if

a multiplicity of equally spaced and backwardly.

the extension I6 `being provided with a tapered portion I1 and terminating in a pocket I8, the latter receiving a compressiblel coiled spring I9.

The rotor Il is provided at its periphery with curved fins 2lwhich barely pass the teeth of the gear or internally toothed ring I4 which is provided with the internal teeth 2|. At approximately every a duct 22 radiates from the axis of the rotor and opens through the periphery thereof, as is clearly lshown in Figure 3. 5

'I'he interior of the housing 9 constitutes a tank for an oil or similar substance which can enter the inner end of the motor shaft 1 by way of the openings 23. The interior of the shaft 1 is partitioned oi at 24 so that the oil must follow a pathV through the ducts or openings 23 to reach the periphery of the rotor. A valve element 25 has a tapering portion 26 which is seatable within the tapered portion I1 of the shaft extension I6 and obviously, this valve element 25 can be moved back and forth to regulate the amount of oil passing to the. ducts 22. The housing 9 is provided with an opening 21 in the top thereof through which the lower portion of the rocker 28 extends, the rocker being swingably supported, 20 as at 29. The top of the housing 9 is provided with a 4ller plug .30, while the bottom is provided with a drain plug 3|.

As is clearly shown in Figure 1,.numera1 32' represents. a control rod and this connects to a collar 33 internally threaded and feedable to proper adjustment on the threaded portion 34 of the upstanding bar 35 connected by a link rod 36 to the upper end of the rocker 38.

'I'he lowerend of the rocker 28 is connected, 30' as at 31, to the upstanding shank 38 of a pair of rings 39 which circumscribe the shaft 1.

As is clearly shown in Figure 2, the valve 2i is provided with an elongated stem 40 extending in the shaft 1 and this is provided with an eye 35 4I through which the rod 42 extends. This rod 4 2 extends through slots 43 in the 'sideof the shaft 1 and terminates between the rings 39. Thus the shaft 1 can rotate freely without interfering with the adjustability of the valve adjusting means.

While the foregoing speciilcation sets forth the invention in definite terms, it is to be understoodthat numerouschanges in the shape, size, ma. terials and arrangement of parts may be re'sorted to without departing from the spirit and scope of the appended claim.

lHaving described the invention, what is claimed as new isz- A speed'control mechanism comprising a hous- 50 ing, a drive shaft extending into the housing, a driven shaft extendingvinto the housing, a rotor. secured to the inner end-of\the driven shaft, an-intemally toothed ring-on the inner end of the drive shaft within which insana' rotor y15155 operative, said rotor being provided with backwardly curved fins at, its periphery, the inner end of said drive shaft being hollow and provided with an opening, ducts radiating from the axis of the rotor and being in communication with the interior of the hollow portion of the vdrive shaft and opening through the periphery of the rotor, and a valve operative axially of the rotor for controlling the passage of liquid into the said ducts, said valve being provided with a stem extending longitudinally in the hollow shaft, said hollow shaft being provided with a pair of diametrically opposite longitudinally extending slots, a cross pin at the end of the stem opposite from the end at which the valve is located, said pin extending at its ends through the slots in the hollow shaft, a rocker having one end portion extending into the housing, a pair of rings loosely circumscribing the hollow shaft and being attached to the inner end of the rocker to assume a spaced parallel relation with respect to each other, the ends of the said cross pin extendl0 ing into the space between the said rings.`

GAIL GRIMSLEY. 

